package cn.njyd.corejava.thread.myday04;

import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;

public class CollectionDemo01 {
    public static void main(String[] args) {
//        List<String> list = new ArrayList<>();
//        Vector<String> list = new Vector<>();
//        List<String> list = Collections.synchronizedList(new ArrayList<>());

        List<String> list = new CopyOnWriteArrayList<>();
        for (int i=1;i<=50;i++) {
            new Thread(()->{
                list.add(UUID.randomUUID().toString().substring(0,6));
                System.out.println(list);
            }).start();
        }
    }
}
